Mesa (master): nv50: correct the negation of DDY sources

[Christoph Bumiller]

Module: Mesa
Branch: master
Commit: ebbc73d1aed283c9bc4aa2b37bed4374bbaec5b5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ebbc73d1aed283c9bc4aa2b37bed4374bbaec5b5

Author: Christoph Bumiller <e0425955 at student.tuwien.ac.at>
Date:   Mon Dec 21 21:50:21 2009 +0100

nv50: correct the negation of DDY sources

The state tracker now does the correct thing, so
interpret negation normally.

---

 src/gallium/drivers/nv50/nv50_program.c |   22 +++++++---------------
 1 files changed, 7 insertions(+), 15 deletions(-)

diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index 04b345b..679c28c 100644
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -1702,8 +1702,8 @@ emit_ddx(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
 
 	assert(src->type == P_TEMP);
 
-	e->inst[0] = 0xc0140000;
-	e->inst[1] = 0x89800000;
+	e->inst[0] = (src->mod & NV50_MOD_NEG) ? 0xc0240000 : 0xc0140000;
+	e->inst[1] = (src->mod & NV50_MOD_NEG) ? 0x86400000 : 0x89800000;
 	set_long(pc, e);
 	set_dst(pc, dst, e);
 	set_src_0(pc, src, e);
@@ -1715,25 +1715,16 @@ emit_ddx(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
 static void
 emit_ddy(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
 {
-	struct nv50_reg *r = src;
 	struct nv50_program_exec *e = exec(pc);
 
 	assert(src->type == P_TEMP);
 
-	if (!(src->mod & NV50_MOD_NEG)) { /* ! double negation */
-		r = alloc_temp(pc, NULL);
-		emit_neg(pc, r, src);
-	}
-
-	e->inst[0] = 0xc0150000;
-	e->inst[1] = 0x8a400000;
+	e->inst[0] = (src->mod & NV50_MOD_NEG) ? 0xc0250000 : 0xc0150000;
+	e->inst[1] = (src->mod & NV50_MOD_NEG) ? 0x85800000 : 0x8a400000;
 	set_long(pc, e);
 	set_dst(pc, dst, e);
-	set_src_0(pc, r, e);
-	set_src_2(pc, r, e);
-
-	if (r != src)
-		free_temp(pc, r);
+	set_src_0(pc, src, e);
+	set_src_2(pc, src, e);
 
 	emit(pc, e);
 }
@@ -1791,6 +1782,7 @@ static boolean
 negate_supported(const struct tgsi_full_instruction *insn, int i)
 {
 	switch (insn->Instruction.Opcode) {
+	case TGSI_OPCODE_DDX:
 	case TGSI_OPCODE_DDY:
 	case TGSI_OPCODE_DP3:
 	case TGSI_OPCODE_DP4: