Mesa (master): ac: add ac_build_fmin/fmax helpers

[Marek Olšák]

Module: Mesa
Branch: master
Commit: a140aeb6195553efeab703e7e21b1d553eef205e
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a140aeb6195553efeab703e7e21b1d553eef205e

Author: Marek Olšák <marek.olsak at amd.com>
Date:   Tue Jan  2 03:59:43 2018 +0100

ac: add ac_build_fmin/fmax helpers

Reviewed-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>

---

 src/amd/common/ac_llvm_build.c | 32 ++++++++++++++++++--------------
 src/amd/common/ac_llvm_build.h |  5 ++++-
 2 files changed, 22 insertions(+), 15 deletions(-)

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 8a3a2abf17..efc6fa12e5 100644
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -1222,6 +1222,22 @@ ac_build_umsb(struct ac_llvm_context *ctx,
 			       LLVMConstInt(ctx->i32, -1, true), msb, "");
 }
 
+LLVMValueRef ac_build_fmin(struct ac_llvm_context *ctx, LLVMValueRef a,
+			   LLVMValueRef b)
+{
+	LLVMValueRef args[2] = {a, b};
+	return ac_build_intrinsic(ctx, "llvm.minnum.f32", ctx->f32, args, 2,
+				  AC_FUNC_ATTR_READNONE);
+}
+
+LLVMValueRef ac_build_fmax(struct ac_llvm_context *ctx, LLVMValueRef a,
+			   LLVMValueRef b)
+{
+	LLVMValueRef args[2] = {a, b};
+	return ac_build_intrinsic(ctx, "llvm.maxnum.f32", ctx->f32, args, 2,
+				  AC_FUNC_ATTR_READNONE);
+}
+
 LLVMValueRef ac_build_umin(struct ac_llvm_context *ctx, LLVMValueRef a,
 			   LLVMValueRef b)
 {
@@ -1232,20 +1248,8 @@ LLVMValueRef ac_build_umin(struct ac_llvm_context *ctx, LLVMValueRef a,
 LLVMValueRef ac_build_clamp(struct ac_llvm_context *ctx, LLVMValueRef value)
 {
 	if (HAVE_LLVM >= 0x0500) {
-		LLVMValueRef max[2] = {
-			value,
-			LLVMConstReal(ctx->f32, 0),
-		};
-		LLVMValueRef min[2] = {
-			LLVMConstReal(ctx->f32, 1),
-		};
-
-		min[1] = ac_build_intrinsic(ctx, "llvm.maxnum.f32",
-					    ctx->f32, max, 2,
-					    AC_FUNC_ATTR_READNONE);
-		return ac_build_intrinsic(ctx, "llvm.minnum.f32",
-					  ctx->f32, min, 2,
-					  AC_FUNC_ATTR_READNONE);
+		return ac_build_fmin(ctx, ac_build_fmax(ctx, value, ctx->f32_0),
+				     ctx->f32_1);
 	}
 
 	LLVMValueRef args[3] = {
diff --git a/src/amd/common/ac_llvm_build.h b/src/amd/common/ac_llvm_build.h
index 3c81e2d43d..e0fe0a58a4 100644
--- a/src/amd/common/ac_llvm_build.h
+++ b/src/amd/common/ac_llvm_build.h
@@ -244,7 +244,10 @@ LLVMValueRef ac_build_imsb(struct ac_llvm_context *ctx,
 LLVMValueRef ac_build_umsb(struct ac_llvm_context *ctx,
 			  LLVMValueRef arg,
 			  LLVMTypeRef dst_type);
-
+LLVMValueRef ac_build_fmin(struct ac_llvm_context *ctx, LLVMValueRef a,
+			   LLVMValueRef b);
+LLVMValueRef ac_build_fmax(struct ac_llvm_context *ctx, LLVMValueRef a,
+			   LLVMValueRef b);
 LLVMValueRef ac_build_umin(struct ac_llvm_context *ctx, LLVMValueRef a, LLVMValueRef b);
 LLVMValueRef ac_build_clamp(struct ac_llvm_context *ctx, LLVMValueRef value);