From: Corbin Simpson <MostAwesomeDude@gmail.com>
Date: Wed, 21 May 2008 15:24:28 +0000 (-0700)
Subject: r5xx: Add OPCODE_POW.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1e2907f170116138b1ae304dc075ee52e377fd73;p=mesa.git

r5xx: Add OPCODE_POW.
Necessary for Google Earth, among other things.
---

diff --git a/src/mesa/drivers/dri/r300/r500_fragprog.c b/src/mesa/drivers/dri/r300/r500_fragprog.c
index 9e08b2757fb..70940e82153 100644
--- a/src/mesa/drivers/dri/r300/r500_fragprog.c
+++ b/src/mesa/drivers/dri/r300/r500_fragprog.c
@@ -93,6 +93,9 @@
 #define MAKE_SWIZ_RGBA_C(x) (x << 14)
 #define MAKE_SWIZ_ALPHA_C(x) (x << 27)
 
+/* Writemasks */
+#define R500_WRITEMASK_ARGB 0xF
+
 static void dump_program(struct r500_fragment_program *fp);
 
 static inline GLuint make_rgb_swizzle(struct prog_src_register src) {
@@ -686,6 +689,50 @@ static GLboolean parse_program(struct r500_fragment_program *fp)
 					// | R500_ALU_RGBA_ALPHA_SEL_C_SRC2
 					| MAKE_SWIZ_ALPHA_C(R500_SWIZZLE_ZERO);
 				break;
+			case OPCODE_POW:
+				/* POW(a,b) = EX2(LN2(a)*b) */
+				src[0] = make_src(fp, fpi->SrcReg[0]);
+				src[1] = make_src(fp, fpi->SrcReg[1]);
+				fp->inst[counter].inst0 = R500_INST_TYPE_ALU | R500_INST_TEX_SEM_WAIT
+					| (R500_WRITEMASK_ARGB << 11);
+				fp->inst[counter].inst1 = R500_RGB_ADDR0(src[0]);
+				fp->inst[counter].inst2 = R500_ALPHA_ADDR0(src[0]);
+				fp->inst[counter].inst3 = R500_ALU_RGB_SEL_A_SRC0
+					| MAKE_SWIZ_RGB_A(make_rgb_swizzle(fpi->SrcReg[0]));
+				fp->inst[counter].inst4 = R500_ALPHA_OP_LN2
+					| R500_ALPHA_ADDRD(get_temp(fp, 0))
+					| R500_ALPHA_SEL_A_SRC0 | MAKE_SWIZ_ALPHA_A(make_sop_swizzle(fpi->SrcReg[0]));
+				fp->inst[counter].inst5 = R500_ALU_RGBA_OP_SOP
+					| R500_ALU_RGBA_ADDRD(get_temp(fp, 0));
+				counter++;
+				fp->inst[counter].inst0 = R500_INST_TYPE_ALU | (R500_WRITEMASK_ARGB << 11);
+				fp->inst[counter].inst1 = R500_RGB_ADDR0(get_temp(fp, 0))
+					| R500_RGB_ADDR1(src[1]);
+				fp->inst[counter].inst2 = R500_ALPHA_ADDR0(get_temp(fp, 0))
+					| R500_ALPHA_ADDR1(src[1]);
+				fp->inst[counter].inst3 = R500_ALU_RGB_SEL_A_SRC0
+					| MAKE_SWIZ_RGB_A(make_rgb_swizzle(fpi->SrcReg[0]))
+					| R500_ALU_RGB_SEL_B_SRC1 | MAKE_SWIZ_RGB_B(make_rgb_swizzle(fpi->SrcReg[1]));
+				fp->inst[counter].inst4 = R500_ALPHA_OP_MAD
+					| R500_ALPHA_ADDRD(get_temp(fp, 1))
+					| R500_ALPHA_SEL_A_SRC0 | MAKE_SWIZ_ALPHA_A(make_alpha_swizzle(fpi->SrcReg[0]))
+					| R500_ALPHA_SEL_B_SRC1 | MAKE_SWIZ_ALPHA_B(make_alpha_swizzle(fpi->SrcReg[1]));
+				fp->inst[counter].inst5 = R500_ALU_RGBA_OP_MAD
+					| R500_ALU_RGBA_ADDRD(get_temp(fp, 1))
+					| MAKE_SWIZ_RGBA_C(R500_SWIZ_RGB_ZERO)
+					| MAKE_SWIZ_ALPHA_C(R500_SWIZZLE_ZERO);
+				counter++;
+				emit_alu(fp, counter, fpi);
+				fp->inst[counter].inst1 = R500_RGB_ADDR0(get_temp(fp, 1));
+				fp->inst[counter].inst2 = R500_ALPHA_ADDR0(get_temp(fp, 1));
+				fp->inst[counter].inst3 = R500_ALU_RGB_SEL_A_SRC0
+					| MAKE_SWIZ_RGB_A(make_rgb_swizzle(fpi->SrcReg[0]));
+				fp->inst[counter].inst4 = R500_ALPHA_OP_EX2
+					| R500_ALPHA_ADDRD(dest)
+					| R500_ALPHA_SEL_A_SRC0 | MAKE_SWIZ_ALPHA_A(make_sop_swizzle(fpi->SrcReg[0]));
+				fp->inst[counter].inst5 = R500_ALU_RGBA_OP_SOP
+					| R500_ALU_RGBA_ADDRD(dest);
+				break;
 			case OPCODE_RCP:
 				src[0] = make_src(fp, fpi->SrcReg[0]);
 				emit_alu(fp, counter, fpi);