diff options
Diffstat (limited to 'src/gallium/drivers/nouveau/codegen/target_lib_nvc0.asm')
| -rw-r--r-- | src/gallium/drivers/nouveau/codegen/target_lib_nvc0.asm | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/gallium/drivers/nouveau/codegen/target_lib_nvc0.asm b/src/gallium/drivers/nouveau/codegen/target_lib_nvc0.asm new file mode 100644 index 0000000..f40becc --- /dev/null +++ b/src/gallium/drivers/nouveau/codegen/target_lib_nvc0.asm @@ -0,0 +1,96 @@ +// +// DIV U32 +// +// UNR recurrence (q = a / b): +// look for z such that 2^32 - b <= b * z < 2^32 +// then q - 1 <= (a * z) / 2^32 <= q +// +// INPUT: $r0: dividend, $r1: divisor +// OUTPUT: $r0: result, $r1: modulus +// CLOBBER: $r2 - $r3, $p0 - $p1 +// SIZE: 22 / 14 * 8 bytes +// +bfind u32 $r2 $r1 +xor b32 $r2 $r2 0x1f +mov b32 $r3 0x1 +shl b32 $r2 $r3 clamp $r2 +cvt u32 $r1 neg u32 $r1 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mov b32 $r3 $r0 +mul high $r0 u32 $r0 u32 $r2 +cvt u32 $r2 neg u32 $r1 +add $r1 (mul u32 $r1 u32 $r0) $r3 +set $p0 0x1 ge u32 $r1 $r2 +$p0 sub b32 $r1 $r1 $r2 +$p0 add b32 $r0 $r0 0x1 +$p0 set $p0 0x1 ge u32 $r1 $r2 +$p0 sub b32 $r1 $r1 $r2 +$p0 add b32 $r0 $r0 0x1 +ret +// +// DIV S32, like DIV U32 after taking ABS(inputs) +// +// INPUT: $r0: dividend, $r1: divisor +// OUTPUT: $r0: result, $r1: modulus +// CLOBBER: $r2 - $r3, $p0 - $p3 +// +set $p2 0x1 lt s32 $r0 0x0 +set $p3 0x1 lt s32 $r1 0x0 xor $p2 +cvt s32 $r0 abs s32 $r0 +cvt s32 $r1 abs s32 $r1 +bfind u32 $r2 $r1 +xor b32 $r2 $r2 0x1f +mov b32 $r3 0x1 +shl b32 $r2 $r3 clamp $r2 +cvt u32 $r1 neg u32 $r1 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mul $r3 u32 $r1 u32 $r2 +add $r2 (mul high u32 $r2 u32 $r3) $r2 +mov b32 $r3 $r0 +mul high $r0 u32 $r0 u32 $r2 +cvt u32 $r2 neg u32 $r1 +add $r1 (mul u32 $r1 u32 $r0) $r3 +set $p0 0x1 ge u32 $r1 $r2 +$p0 sub b32 $r1 $r1 $r2 +$p0 add b32 $r0 $r0 0x1 +$p0 set $p0 0x1 ge u32 $r1 $r2 +$p0 sub b32 $r1 $r1 $r2 +$p0 add b32 $r0 $r0 0x1 +$p3 cvt s32 $r0 neg s32 $r0 +$p2 cvt s32 $r1 neg s32 $r1 +ret +// +// RCP F64: Newton Raphson reciprocal(x): r_{i+1} = r_i * (2.0 - x * r_i) +// +// INPUT: $r0d (x) +// OUTPUT: $r0d (rcp(x)) +// CLOBBER: $r2 - $r7 +// SIZE: 9 * 8 bytes +// +nop +ret +// RSQ F64: Newton Raphson rsqrt(x): r_{i+1} = r_i * (1.5 - 0.5 * x * r_i * r_i) +// +// INPUT: $r0d (x) +// OUTPUT: $r0d (rsqrt(x)) +// CLOBBER: $r2 - $r7 +// SIZE: 14 * 8 bytes +// +nop +ret |