radeonsi: set no-signed-zeros-fp-math
Recommended by Matt Arsenault. 46757 shaders in 28742 tests Totals: SGPRS: 2068851 -> 2066907 (-0.09 %) VGPRS: 1604056 -> 1602676 (-0.09 %) Spilled SGPRs: 1402 -> 1382 (-1.43 %) Spilled VGPRs: 113 -> 113 (0.00 %) Private memory VGPRs: 1332 -> 1332 (0.00 %) Scratch size: 3224 -> 3188 (-1.12 %) dwords per thread Code Size: 58815520 -> 58716788 (-0.17 %) bytes LDS: 1162 -> 1162 (0.00 %) blocks Max Waves: 354616 -> 354905 (0.08 %) Wait states: 0 -> 0 (0.00 %) Totals from affected shaders: SGPRS: 786452 -> 784508 (-0.25 %) VGPRS: 530000 -> 528620 (-0.26 %) Spilled SGPRs: 958 -> 938 (-2.09 %) Spilled VGPRs: 85 -> 85 (0.00 %) Private memory VGPRs: 636 -> 636 (0.00 %) Scratch size: 1880 -> 1844 (-1.91 %) dwords per thread Code Size: 26349936 -> 26251204 (-0.37 %) bytes LDS: 304 -> 304 (0.00 %) blocks Max Waves: 108962 -> 109251 (0.27 %) Wait states: 0 -> 0 (0.00 %) Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
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@ -5251,6 +5251,10 @@ static void si_create_function(struct si_shader_context *ctx,
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lp_add_function_attr(ctx->main_fn, i + 1, LP_FUNC_ATTR_INREG);
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}
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LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
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"no-signed-zeros-fp-math",
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"true");
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if (ctx->screen->b.debug_flags & DBG_UNSAFE_MATH) {
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/* These were copied from some LLVM test. */
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LLVMAddTargetDependentFunctionAttr(ctx->main_fn,
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@ -1269,7 +1269,7 @@ void si_llvm_context_init(struct si_shader_context *ctx,
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bool unsafe_fpmath = (sscreen->b.debug_flags & DBG_UNSAFE_MATH) != 0;
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enum lp_float_mode float_mode =
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unsafe_fpmath ? LP_FLOAT_MODE_UNSAFE_FP_MATH :
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LP_FLOAT_MODE_DEFAULT;
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LP_FLOAT_MODE_NO_SIGNED_ZEROS_FP_MATH;
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ctx->gallivm.builder = lp_create_builder(ctx->gallivm.context,
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float_mode);
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