mesa: add GL_OES_gpu_shader5 and GL_EXT_gpu_shader5 support

The two extensions are identical, and are largely taking bits of already
existing desktop functionality. We continue to do a poor job of
supporting the 'precise' keyword, just like we do on desktop.

This passes the relevant dEQP tests that I could find.

Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>

6 files changed, 90 insertions, 57 deletions

diff --git a/src/compiler/glsl/ast_array_index.cpp b/src/compiler/glsl/ast_array_index.cpp
index f5baeb9..69322cf 100644
--- a/src/compiler/glsl/ast_array_index.cpp
+++ b/src/compiler/glsl/ast_array_index.cpp
@@ -236,14 +236,23 @@ _mesa_ast_array_index_to_hir(void *mem_ctx,
             _mesa_glsl_error(&loc, state, "unsized array index must be constant");
          }
       } else if (array->type->without_array()->is_interface()
-                 && (array->variable_referenced()->data.mode == ir_var_uniform ||
-                     array->variable_referenced()->data.mode == ir_var_shader_storage)
-                 && !state->is_version(400, 0) && !state->ARB_gpu_shader5_enable) {
-	 /* Page 50 in section 4.3.9 of the OpenGL ES 3.10 spec says:
-	  *
-	  *     "All indices used to index a uniform or shader storage block
-	  *     array must be constant integral expressions."
-	  */
+                 && ((array->variable_referenced()->data.mode == ir_var_uniform
+                      && !state->is_version(400, 320)
+                      && !state->ARB_gpu_shader5_enable
+                      && !state->EXT_gpu_shader5_enable
+                      && !state->OES_gpu_shader5_enable) ||
+                     (array->variable_referenced()->data.mode == ir_var_shader_storage
+                      && !state->is_version(400, 0)
+                      && !state->ARB_gpu_shader5_enable))) {
+         /* Page 50 in section 4.3.9 of the OpenGL ES 3.10 spec says:
+          *
+          *     "All indices used to index a uniform or shader storage block
+          *     array must be constant integral expressions."
+          *
+          * But OES_gpu_shader5 (and ESSL 3.20) relax this to allow indexing
+          * on uniform blocks but not shader storage blocks.
+          *
+          */
 	 _mesa_glsl_error(&loc, state, "%s block array index must be constant",
                           array->variable_referenced()->data.mode
                           == ir_var_uniform ? "uniform" : "shader storage");
@@ -279,7 +288,10 @@ _mesa_ast_array_index_to_hir(void *mem_ctx,
        * dynamically uniform expression is undefined.
        */
       if (array->type->without_array()->is_sampler()) {
-         if (!state->is_version(400, 0) && !state->ARB_gpu_shader5_enable) {
+         if (!state->is_version(400, 320) &&
+             !state->ARB_gpu_shader5_enable &&
+             !state->EXT_gpu_shader5_enable &&
+             !state->OES_gpu_shader5_enable) {
             if (state->is_version(130, 300))
                _mesa_glsl_error(&loc, state,
                                 "sampler arrays indexed with non-constant "
diff --git a/src/compiler/glsl/builtin_functions.cpp b/src/compiler/glsl/builtin_functions.cpp
index bbb237a..0a0dcc6 100644
--- a/src/compiler/glsl/builtin_functions.cpp
+++ b/src/compiler/glsl/builtin_functions.cpp
@@ -149,12 +149,6 @@ v400_fs_only(const _mesa_glsl_parse_state *state)
 }
 
 static bool
-es31(const _mesa_glsl_parse_state *state)
-{
-   return state->is_version(0, 310);
-}
-
-static bool
 texture_rectangle(const _mesa_glsl_parse_state *state)
 {
    return state->ARB_texture_rectangle_enable;
@@ -239,6 +233,21 @@ gpu_shader5(const _mesa_glsl_parse_state *state)
 }
 
 static bool
+gpu_shader5_es(const _mesa_glsl_parse_state *state)
+{
+   return state->is_version(400, 320) ||
+          state->ARB_gpu_shader5_enable ||
+          state->EXT_gpu_shader5_enable ||
+          state->OES_gpu_shader5_enable;
+}
+
+static bool
+es31_not_gs5(const _mesa_glsl_parse_state *state)
+{
+   return state->is_version(0, 310) && !gpu_shader5_es(state);
+}
+
+static bool
 gpu_shader5_or_es31(const _mesa_glsl_parse_state *state)
 {
    return state->is_version(400, 310) || state->ARB_gpu_shader5_enable;
@@ -360,8 +369,10 @@ texture_gather_or_es31(const _mesa_glsl_parse_state *state)
 static bool
 texture_gather_only_or_es31(const _mesa_glsl_parse_state *state)
 {
-   return !state->is_version(400, 0) &&
+   return !state->is_version(400, 320) &&
           !state->ARB_gpu_shader5_enable &&
+          !state->EXT_gpu_shader5_enable &&
+          !state->OES_gpu_shader5_enable &&
           (state->ARB_texture_gather_enable ||
            state->is_version(0, 310));
 }
@@ -1070,10 +1081,10 @@ builtin_builder::create_builtins()
 
 #define FDGS5(NAME)                                 \
    add_function(#NAME,                          \
-                _##NAME(gpu_shader5, glsl_type::float_type), \
-                _##NAME(gpu_shader5, glsl_type::vec2_type),  \
-                _##NAME(gpu_shader5, glsl_type::vec3_type),                  \
-                _##NAME(gpu_shader5, glsl_type::vec4_type),  \
+                _##NAME(gpu_shader5_es, glsl_type::float_type), \
+                _##NAME(gpu_shader5_es, glsl_type::vec2_type),  \
+                _##NAME(gpu_shader5_es, glsl_type::vec3_type),                  \
+                _##NAME(gpu_shader5_es, glsl_type::vec4_type),  \
                 _##NAME(fp64, glsl_type::double_type),  \
                 _##NAME(fp64, glsl_type::dvec2_type),    \
                 _##NAME(fp64, glsl_type::dvec3_type),     \
@@ -2534,62 +2545,62 @@ builtin_builder::create_builtins()
                 _texture(ir_tg4, texture_gather_only_or_es31, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET),
                 _texture(ir_tg4, texture_gather_only_or_es31, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET),
 
-                _texture(ir_tg4, es31, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET | TEX_COMPONENT),
-                _texture(ir_tg4, es31, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET | TEX_COMPONENT),
-                _texture(ir_tg4, es31, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET | TEX_COMPONENT),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET | TEX_COMPONENT),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET | TEX_COMPONENT),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET | TEX_COMPONENT),
 
-                _texture(ir_tg4, es31, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET | TEX_COMPONENT),
-                _texture(ir_tg4, es31, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET | TEX_COMPONENT),
-                _texture(ir_tg4, es31, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET | TEX_COMPONENT),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET | TEX_COMPONENT),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET | TEX_COMPONENT),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET | TEX_COMPONENT),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
 
                 _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
                 _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
                 _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
 
                 _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
                 _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
                 _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST | TEX_COMPONENT),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DShadow_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DArrayShadow_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DShadow_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DArrayShadow_type, glsl_type::vec3_type, TEX_OFFSET_NONCONST),
                 _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DRectShadow_type, glsl_type::vec2_type, TEX_OFFSET_NONCONST),
 
-                _texture(ir_tg4, es31, glsl_type::vec4_type, glsl_type::sampler2DShadow_type, glsl_type::vec2_type, TEX_OFFSET),
-                _texture(ir_tg4, es31, glsl_type::vec4_type, glsl_type::sampler2DArrayShadow_type, glsl_type::vec3_type, TEX_OFFSET),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::vec4_type, glsl_type::sampler2DShadow_type, glsl_type::vec2_type, TEX_OFFSET),
+                _texture(ir_tg4, es31_not_gs5, glsl_type::vec4_type, glsl_type::sampler2DArrayShadow_type, glsl_type::vec3_type, TEX_OFFSET),
                 NULL);
 
    add_function("textureGatherOffsets",
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2D_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
-                _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::ivec4_type, glsl_type::isampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::uvec4_type, glsl_type::usampler2DArray_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
 
                 _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
                 _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
@@ -2599,8 +2610,8 @@ builtin_builder::create_builtins()
                 _texture(ir_tg4, gpu_shader5, glsl_type::ivec4_type, glsl_type::isampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
                 _texture(ir_tg4, gpu_shader5, glsl_type::uvec4_type, glsl_type::usampler2DRect_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY | TEX_COMPONENT),
 
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DShadow_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
-                _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DArrayShadow_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DShadow_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
+                _texture(ir_tg4, gpu_shader5_es, glsl_type::vec4_type, glsl_type::sampler2DArrayShadow_type, glsl_type::vec3_type, TEX_OFFSET_ARRAY),
                 _texture(ir_tg4, gpu_shader5, glsl_type::vec4_type, glsl_type::sampler2DRectShadow_type, glsl_type::vec2_type, TEX_OFFSET_ARRAY),
                 NULL);
 
diff --git a/src/compiler/glsl/glcpp/glcpp-parse.y b/src/compiler/glsl/glcpp/glcpp-parse.y
index b03e191..5c38f86 100644
--- a/src/compiler/glsl/glcpp/glcpp-parse.y
+++ b/src/compiler/glsl/glcpp/glcpp-parse.y
@@ -2398,6 +2398,10 @@ _glcpp_parser_handle_version_declaration(glcpp_parser_t *parser, intmax_t versio
                     add_builtin_define(parser, "GL_OES_geometry_point_size", 1);
                     add_builtin_define(parser, "GL_OES_geometry_shader", 1);
                  }
+                 if (extensions->ARB_gpu_shader5) {
+                    add_builtin_define(parser, "GL_EXT_gpu_shader5", 1);
+                    add_builtin_define(parser, "GL_OES_gpu_shader5", 1);
+                 }
               }
 	   }
 	} else {
diff --git a/src/compiler/glsl/glsl_lexer.ll b/src/compiler/glsl/glsl_lexer.ll
index 9704fc7..1f12265 100644
--- a/src/compiler/glsl/glsl_lexer.ll
+++ b/src/compiler/glsl/glsl_lexer.ll
@@ -361,7 +361,7 @@ samplerExternalOES		{
 		}
 
    /* keywords available with ARB_gpu_shader5 */
-precise		KEYWORD_WITH_ALT(400, 0, 400, 0, yyextra->ARB_gpu_shader5_enable, PRECISE);
+precise		KEYWORD_WITH_ALT(400, 310, 400, 320, yyextra->ARB_gpu_shader5_enable || yyextra->EXT_gpu_shader5_enable || yyextra->OES_gpu_shader5_enable, PRECISE);
 
    /* keywords available with ARB_shader_image_load_store */
 image1D         KEYWORD_WITH_ALT(130, 300, 420, 0, yyextra->ARB_shader_image_load_store_enable, IMAGE1D);
diff --git a/src/compiler/glsl/glsl_parser_extras.cpp b/src/compiler/glsl/glsl_parser_extras.cpp
index ec180c0..7a6f5c0 100644
--- a/src/compiler/glsl/glsl_parser_extras.cpp
+++ b/src/compiler/glsl/glsl_parser_extras.cpp
@@ -606,6 +606,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(OES_EGL_image_external,         false, true,      OES_EGL_image_external),
    EXT(OES_geometry_point_size,        false, true,      OES_geometry_shader),
    EXT(OES_geometry_shader,            false, true,      OES_geometry_shader),
+   EXT(OES_gpu_shader5,                false, true,      ARB_gpu_shader5),
    EXT(OES_shader_image_atomic,        false, true,      ARB_shader_image_load_store),
    EXT(OES_standard_derivatives,       false, true,      OES_standard_derivatives),
    EXT(OES_texture_3D,                 false, true,      dummy_true),
@@ -620,6 +621,7 @@ static const _mesa_glsl_extension _mesa_glsl_supported_extensions[] = {
    EXT(AMD_vertex_shader_viewport_index, true,  false,   AMD_vertex_shader_viewport_index),
    EXT(EXT_blend_func_extended,        false,  true,     ARB_blend_func_extended),
    EXT(EXT_draw_buffers,               false,  true,     dummy_true),
+   EXT(EXT_gpu_shader5,                false, true,      ARB_gpu_shader5),
    EXT(EXT_separate_shader_objects,    false, true,      dummy_true),
    EXT(EXT_shader_integer_mix,         true,  true,      EXT_shader_integer_mix),
    EXT(EXT_shader_samples_identical,   true,  true,      EXT_shader_samples_identical),
diff --git a/src/compiler/glsl/glsl_parser_extras.h b/src/compiler/glsl/glsl_parser_extras.h
index 86ec057..74825a0 100644
--- a/src/compiler/glsl/glsl_parser_extras.h
+++ b/src/compiler/glsl/glsl_parser_extras.h
@@ -593,6 +593,8 @@ struct _mesa_glsl_parse_state {
    bool OES_geometry_point_size_warn;
    bool OES_geometry_shader_enable;
    bool OES_geometry_shader_warn;
+   bool OES_gpu_shader5_enable;
+   bool OES_gpu_shader5_warn;
    bool OES_shader_image_atomic_enable;
    bool OES_shader_image_atomic_warn;
    bool OES_standard_derivatives_enable;
@@ -618,6 +620,8 @@ struct _mesa_glsl_parse_state {
    bool EXT_blend_func_extended_warn;
    bool EXT_draw_buffers_enable;
    bool EXT_draw_buffers_warn;
+   bool EXT_gpu_shader5_enable;
+   bool EXT_gpu_shader5_warn;
    bool EXT_separate_shader_objects_enable;
    bool EXT_separate_shader_objects_warn;
    bool EXT_shader_integer_mix_enable;