On 01/19/2015 03:31 PM, Matt Turner wrote:
> total instructions in shared programs: 5952059 -> 5951603 (-0.01%)
> instructions in affected programs: 138812 -> 138356 (-0.33%)
> GAINED: 1
> LOST: 0
Does the "glsl: Rewrite (-abs(x) >= 0) as (x == 0)" patch in my
bool-optimizations-v2 tree achieve the same thing?
> ---
> src/mesa/drivers/dri/i965/brw_fs.cpp | 12 ++++++++++++
> src/mesa/drivers/dri/i965/brw_vec4.cpp | 12 ++++++++++++
> 2 files changed, 24 insertions(+)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_fs.cpp
> b/src/mesa/drivers/dri/i965/brw_fs.cpp
> index 994d457..ac6fe33 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs.cpp
> @@ -2365,6 +2365,18 @@ fs_visitor::opt_algebraic()
> break;
> }
> break;
> + case BRW_OPCODE_CMP:
> + if (inst->conditional_mod == BRW_CONDITIONAL_GE &&
> + inst->src[0].abs &&
> + inst->src[0].negate &&
> + inst->src[1].is_zero()) {
> + inst->src[0].abs = false;
> + inst->src[0].negate = false;
> + inst->conditional_mod = BRW_CONDITIONAL_Z;
> + progress = true;
> + break;
> + }
> + break;
> case BRW_OPCODE_SEL:
> if (inst->src[0].equals(inst->src[1])) {
> inst->opcode = BRW_OPCODE_MOV;
> diff --git a/src/mesa/drivers/dri/i965/brw_vec4.cpp
> b/src/mesa/drivers/dri/i965/brw_vec4.cpp
> index 0fac949..8988196 100644
> --- a/src/mesa/drivers/dri/i965/brw_vec4.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_vec4.cpp
> @@ -693,6 +693,18 @@ vec4_visitor::opt_algebraic()
> progress = true;
> }
> break;
> + case BRW_OPCODE_CMP:
> + if (inst->conditional_mod == BRW_CONDITIONAL_GE &&
> + inst->src[0].abs &&
> + inst->src[0].negate &&
> + inst->src[1].is_zero()) {
> + inst->src[0].abs = false;
> + inst->src[0].negate = false;
> + inst->conditional_mod = BRW_CONDITIONAL_Z;
> + progress = true;
> + break;
> + }
> + break;
> case SHADER_OPCODE_RCP: {
> vec4_instruction *prev = (vec4_instruction *)inst->prev;
> if (prev->opcode == SHADER_OPCODE_SQRT) {
>
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