skia2/resources/sksl/intrinsics/MinInt.sksl
John Stiles 7f17d36c2c Implement compile-time optimization for min() and max().
`evaluate_intrinsic_1_of_type` was rewritten and now supports up to
three arguments. The following APIs are now optimizable:

	$genType min($genType x, $genType y);
	$genType min($genType x, float y);
	$genHType min($genHType x, $genHType y);
	$genHType min($genHType x, half y);
	$genIType min($genIType x, $genIType y);
	$genIType min($genIType x, int y);
	$genType max($genType x, $genType y);
	$genType max($genType x, float y);
	$genHType max($genHType x, $genHType y);
	$genHType max($genHType x, half y);
	$genIType max($genIType x, $genIType y);
	$genIType max($genIType x, int y);

Change-Id: I0a6467fb60b008b61e8b6a7affaebfcb15f5f7a9
Bug: skia:12034
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/412057
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2021-05-25 14:52:11 +00:00

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uniform half4 testInputs;
uniform half4 colorGreen, colorRed;
half4 main(float2 coords) {
int4 intValues = int4(testInputs * 100);
int4 intGreen = int4(colorGreen * 100);
const int4 constVal = int4(-125, 0, 75, 225);
const int4 constGreen = int4(0, 100, 0, 100);
int4 expectedA = int4(-125, 0, 50, 50);
int4 expectedB = int4(-125, 0, 0, 100);
return (min(intValues.x, 50) == expectedA.x &&
min(intValues.xy, 50) == expectedA.xy &&
min(intValues.xyz, 50) == expectedA.xyz &&
min(intValues.xyzw, 50) == expectedA.xyzw &&
min(constVal.x, 50) == expectedA.x &&
min(constVal.xy, 50) == expectedA.xy &&
min(constVal.xyz, 50) == expectedA.xyz &&
min(constVal.xyzw, 50) == expectedA.xyzw &&
min(intValues.x, intGreen.x) == expectedB.x &&
min(intValues.xy, intGreen.xy) == expectedB.xy &&
min(intValues.xyz, intGreen.xyz) == expectedB.xyz &&
min(intValues.xyzw, intGreen.xyzw) == expectedB.xyzw &&
min(constVal.x, constGreen.x) == expectedB.x &&
min(constVal.xy, constGreen.xy) == expectedB.xy &&
min(constVal.xyz, constGreen.xyz) == expectedB.xyz &&
min(constVal.xyzw, constGreen.xyzw) == expectedB.xyzw) ? colorGreen : colorRed;
}