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authorKeith Whitwell <keith@tungstengraphics.com>2008-05-21 20:34:52 +0100
committerKeith Whitwell <keith@tungstengraphics.com>2008-05-23 09:16:56 +0100
commit0a7a0d79f64de9794878c42bc5b79a04772d7ed8 (patch)
tree7ccd91cc53485db0cce6b0ecac7b6086c477ca62 /src/gallium
parent2302a5d3c1ea2c682dfc034012a054b8327a81de (diff)
draw: fix x87_ex2 and partially fix lit insn
Diffstat (limited to 'src/gallium')
-rw-r--r--src/gallium/auxiliary/draw/draw_vs_aos.c112
1 files changed, 56 insertions, 56 deletions
diff --git a/src/gallium/auxiliary/draw/draw_vs_aos.c b/src/gallium/auxiliary/draw/draw_vs_aos.c
index e736990acc..a365d456d1 100644
--- a/src/gallium/auxiliary/draw/draw_vs_aos.c
+++ b/src/gallium/auxiliary/draw/draw_vs_aos.c
@@ -735,23 +735,26 @@ static void set_fpu_round_nearest( struct aos_compilation *cp )
}
-static void emit_x87_ex2( struct aos_compilation *cp )
+static void x87_emit_ex2( struct aos_compilation *cp )
{
struct x86_reg st0 = x86_make_reg(file_x87, 0);
struct x86_reg st1 = x86_make_reg(file_x87, 1);
- struct x86_reg st3 = x86_make_reg(file_x87, 3);
+ int stack = cp->func->x87_stack;
set_fpu_round_neg_inf( cp );
- x87_fld(cp->func, st0); /* a a */
- x87_fprndint( cp->func ); /* int(a) a */
- x87_fld(cp->func, st0); /* int(a) int(a) a */
- x87_fstp(cp->func, st3); /* int(a) a int(a)*/
- x87_fsubp(cp->func, st1); /* frac(a) int(a) */
- x87_f2xm1(cp->func); /* (2^frac(a))-1 int(a)*/
- x87_fld1(cp->func); /* 1 (2^frac(a))-1 int(a)*/
- x87_faddp(cp->func, st1); /* 2^frac(a) int(a) */
- x87_fscale(cp->func); /* 2^a */
+ x87_fld(cp->func, st0); /* a a */
+ x87_fld(cp->func, st0); /* a a a */
+ x87_fprndint( cp->func ); /* flr(a) a a*/
+ x87_fsubp(cp->func, st1); /* frac(a) a */
+ x87_f2xm1(cp->func); /* (2^frac(a))-1 a */
+ x87_fld1(cp->func); /* 1 (2^frac(a))-1 a */
+ x87_faddp(cp->func, st1); /* 2^frac(a) a */
+ x87_fscale(cp->func); /* 2^a a */
+ x87_fstp(cp->func, st1);
+
+ assert( stack == cp->func->x87_stack);
+
}
@@ -907,9 +910,7 @@ static boolean emit_LG2( struct aos_compilation *cp, const struct tgsi_full_inst
static boolean emit_EX2( struct aos_compilation *cp, const struct tgsi_full_instruction *op )
{
x87_fld_src(cp, &op->FullSrcRegisters[0], 0);
-
- emit_x87_ex2(cp);
-
+ x87_emit_ex2(cp);
x87_fstp_dest4(cp, &op->FullDstRegisters[0]);
return TRUE;
}
@@ -1084,63 +1085,62 @@ static boolean emit_FRC( struct aos_compilation *cp, const struct tgsi_full_inst
static boolean emit_LIT( struct aos_compilation *cp, const struct tgsi_full_instruction *op )
{
struct x86_reg dst = get_dst_ptr(cp, &op->FullDstRegisters[0]);
- struct x86_reg st1 = x86_make_reg(file_x87, 1);
- unsigned fixup1, fixup2;
unsigned writemask = op->FullDstRegisters[0].DstRegister.WriteMask;
- /* Load the interesting parts of arg0:
- */
- x87_fld_src(cp, &op->FullSrcRegisters[0], 3);
- x87_fld_src(cp, &op->FullSrcRegisters[0], 1);
- x87_fld_src(cp, &op->FullSrcRegisters[0], 0);
-
- if (writemask & TGSI_WRITEMASK_XW) {
- x87_fld1(cp->func);
- x87_fst_or_nop(cp->func, writemask, 0, dst);
- x87_fstp_or_pop(cp->func, writemask, 3, dst);
- }
if (writemask & TGSI_WRITEMASK_YZ) {
+ struct x86_reg st1 = x86_make_reg(file_x87, 1);
+ struct x86_reg st2 = x86_make_reg(file_x87, 2);
+
+
- /* Pre-zero destinations, may be overwritten later... fixme.
- */
- x87_fldz(cp->func);
- x87_fst_or_nop(cp->func, writemask, 1, dst);
- x87_fstp_or_pop(cp->func, writemask, 2, dst);
+ /* a1' = a1 <= 0 ? 1 : a1;
+ */
+ x87_fldz(cp->func); /* 0 */
+ x87_fld1(cp->func); /* 1 0 */
+ x87_fld_src(cp, &op->FullSrcRegisters[0], 1); /* a1 1 0 */
+ x87_fcomi(cp->func, st2); /* a1 1 0 */
+ x87_fcmovb(cp->func, st1); /* a1' 1 0 */
+ x87_fstp(cp->func, st1); /* a1' 0 */
+ x87_fstp(cp->func, st1); /* a1' */
+
+ x87_fld_src(cp, &op->FullSrcRegisters[0], 3); /* a3 a1' */
+ x87_fxch(cp->func, st1); /* a1' a3 */
+
- /* Check arg0[0]:
+ /* Compute pow(a1, a3)
*/
- x87_fldz(cp->func); /* 0 a0 a1 a3 */
- x87_fucomp(cp->func, st1); /* a0 a1 a3 */
- x87_fnstsw(cp->func, cp->tmp_EAX);
- x86_sahf(cp->func);
- fixup1 = x86_jcc_forward(cp->func, cc_AE);
-
- x87_fstp_or_pop(cp->func, writemask, 1, dst); /* a1 a3 */
+ x87_fyl2x(cp->func); /* a3*log2(a1) */
+ x87_emit_ex2( cp ); /* 2^(a3*log2(a1)) */
- /* Check arg0[1]:
- */
- x87_fldz(cp->func); /* 0 a1 a3 */
- x87_fucomp(cp->func, st1); /* a1 a3 */
- x87_fnstsw(cp->func, cp->tmp_EAX);
- x86_sahf(cp->func);
- fixup2 = x86_jcc_forward(cp->func, cc_AE);
- /* Compute pow(a1, a3)
+ /* a0' = max2(a0, 0):
*/
- x87_fyl2x(cp->func); /* a3*log2(a1) */
+ x87_fldz(cp->func); /* 0 r2 */
+ x87_fld_src(cp, &op->FullSrcRegisters[0], 0); /* a0 0 r2 */
+ x87_fcomi(cp->func, st1);
+ x87_fcmovb(cp->func, st1); /* a0' 0 r2 */
+ x87_fstp(cp->func, st1); /* a0' r2 */
- emit_x87_ex2( cp ); /* 2^(a3*log2(a1)) */
+ x87_fxch(cp->func, st1); /* a0' r2 */
+ x87_fst_or_nop(cp->func, writemask, 1, dst); /* result[1] = a0' */
+
+ x87_fldz(cp->func); /* 0 a0' r2 */
+ x87_fcomi(cp->func, st1); /* 0 a0' r2 */
+ x87_fcmovnbe(cp->func, st2); /* r2' a0' r2 */
x87_fstp_or_pop(cp->func, writemask, 2, dst);
-
- /* Land jumps:
- */
- x86_fixup_fwd_jump(cp->func, fixup1);
- x86_fixup_fwd_jump(cp->func, fixup2);
+ x87_fpop(cp->func);
+ x87_fpop(cp->func);
+ }
+
+ if (writemask & TGSI_WRITEMASK_XW) {
+ x87_fld1(cp->func);
+ x87_fst_or_nop(cp->func, writemask, 0, dst);
+ x87_fstp_or_pop(cp->func, writemask, 3, dst);
}
return TRUE;
@@ -1222,7 +1222,7 @@ static boolean emit_POW( struct aos_compilation *cp, const struct tgsi_full_inst
x87_fld_src(cp, &op->FullSrcRegisters[0], 0); /* a0.x a1.x */
x87_fyl2x(cp->func); /* a1*log2(a0) */
- emit_x87_ex2( cp ); /* 2^(a1*log2(a0)) */
+ x87_emit_ex2( cp ); /* 2^(a1*log2(a0)) */
x87_fstp_dest4(cp, &op->FullDstRegisters[0]);
return TRUE;